package com.sys.aop;

import java.util.Arrays;
import java.util.Comparator;

public class Sub extends Super{
private void f(){
	System.out.print("Sub.f()");
}
public void k(){
	f();
}

public static void main(String[] args) {
String s="abcdefg";
System.out.println(s.substring(1,4).indexOf("d"));
}
}
